Road Grinding Machine

ABSTRACT

A ridge in a lane of a roadway is ground away by providing a transverse beam carried on the support arms of a transport vehicle across a front of the vehicle, locating the vehicle longitudinally of the lane with the beam extending across the roadway and with the beam located by the vehicle in fixed position parallel to and above the ridge, moving a grinding assembly carried on the beam along the beam for grinding the ridge. The beam carries a gauge for a depth of grinding. The grinding assembly includes a toothed grinder rotatable about an axis transverse to the beam with a width transverse to the beam which is approximately equal to the width of the ridge.

This application claims the benefit of priority under 35 USC 119(e) ofProvisional Application 61/445,368 filed Feb. 22 2011.

This invention relates to a road grinding machine.

BACKGROUND OF THE INVENTION

Many roads particularly in cold environments develop transverse ridgesin the asphalt which cross the pavement at spaced positions along thedirection of travel. These cause severe undulations of travellingvehicles due to the periodic nature of the ridges and are a considerablesource of discomfort for occupants. Up to now there has been no suitablededicated machine for quickly and easily removing these ridges so thatthey need to be ground off by conventional machinery grinding the wholepavement or moved back and forth over the pavement.

SUMMARY OF THE INVENTION

It is one object of the invention to provide a suitable dedicatedmachine for quickly and easily removing these ridges.

According to one aspect of the invention there is provided an apparatusfor grinding a ridge in a lane of a roadway comprising:

a support assembly for attachment to support arms of a transportvehicle;

a transverse beam carried on the support arms so that the transversebeam extends across a front of the vehicle whereby, with the vehiclestanding longitudinally of the lane, the beam extends across theroadway;

and a grinding assembly carried on the beam so as to be movable alongthe beam for grinding the ridge; whereby with the beam located by thevehicle in fixed position parallel to and above the ridge, the grindingassembly moves along the beam to grind the ridge.

Preferably the beam carries ground engaging elements for locating aheight of the beam above the ground whereby the gauge a depth ofgrinding.

Preferably the grinding assembly includes a rotary member with an outersurface for engaging the ridge, the rotary member being rotatable aboutan axis transverse to the beam.

Preferably the rotary member has a series of grinding teeth.

Preferably the grinding member has width transverse to the beam which isapproximately equal to the width of the ridge.

BRIEF DESCRIPTION OF THE DRAWINGS

One embodiment of the invention will now be described in conjunctionwith the accompanying drawings in which:

FIG. 1 is a schematic top plan view of an apparatus according to thepresent invention.

FIG. 2 is a front elevational view of the apparatus of FIG. 1.

In the drawings like characters of reference indicate correspondingparts in the different figures.

DETAILED DESCRIPTION

The apparatus for grinding a ridge 16 in a lane 18 of a roadway 17includes a support assembly 10 designed for attachment to support arms12, 13 of a transport vehicle 14. The vehicle can be of the type such asa skid steer loader or back hoe or other commercial tractor whichincludes front lift arms which can be operated using tractor controls.The support 10 is designed to allow the apparatus to mount on the armsfor movement by the arms, with the design be arranged to match theconnections of the arms as is known to a person skilled in the art. Thelane 18 is defined by side lines 18A.

A transverse beam 11 is carried on the support arms so that thetransverse beam extends across a front of the vehicle whereby, with thevehicle standing longitudinally of the lane, the beam extends across theroadway to or slightly beyond the ends 18A.

A grinding assembly 20 is carried on the beam by a guide mounting 21 soas to be movable along the beam 11 driven by a drive motor 22. Thus themounting 21 can form a sleeve mounted on suitable bearings which allowsfree movement along the beam between the ends of the beam by-passing thesupport 10. The grinding assembly is arranged for grinding the ridge 16with the beam located by the vehicle in fixed position parallel to andabove the ridge. Thus the grinding assembly 20 moves along the beam togrind the ridge back down to the level of the roadway 17.

The beam carries ground engaging elements 27 engaging the roadway 17 forlocating a height of the beam above the ground so as to gauge a depth ofgrinding down to the roadway 17 but no deeper. Thus the grindingassembly is at a constant height on the beam as it operates so that theheight of the beam above the roadway 17 remains fixed with the vehiclestationary.

The grinding assembly includes a rotary member 28 with an outer surface30 of grinding teeth 29 for engaging the ridge, the rotary member beingrotatable about an axis transverse to the beam.

The grinding member has a width W transverse to the beam which isapproximately equal to the width of the ridge, typically of the order of12 to 18 inches and much less than the length of the ridge or the widthof the lane so as to grind only the ridge as the grinding assembly movesacross the beam.

1. Apparatus for grinding a ridge in a lane of a roadway comprising: asupport assembly for attachment to support arms of a transport vehicle;a transverse beam carried on the support arms so that the transversebeam extends across a front of the vehicle whereby, with the vehiclestanding longitudinally of the lane, the beam extends across theroadway; and a grinding assembly carried on the beam so as to be movablealong the beam for grinding the ridge; whereby, with the beam located bythe vehicle in fixed position parallel to and above the ridge, thegrinding assembly moves along the beam to grind the ridge.
 2. Theapparatus according to claim 1 wherein the beam carries ground engagingelements for locating a height of the beam above the ground so as toprovide a gauge for a depth of grinding.
 3. The apparatus according toclaim 1 wherein the grinding assembly includes a rotary member with anouter surface for engaging the ridge, the rotary member being rotatableabout an axis transverse to the beam.
 4. The apparatus according toclaim 1 wherein the rotary member has a series of grinding teeth.
 5. Theapparatus according to claim 1 wherein the grinding member has a widthtransverse to the beam which is approximately equal to the width of theridge.
 6. A method for grinding a ridge in a lane of a roadwaycomprising: providing a support assembly attached to support arms of atransport vehicle; providing a transverse beam carried on the supportarms so that the transverse beam extends across a front of the vehicle;locating the vehicle standing longitudinally of the lane with the beamextending across the roadway; with the beam located by the vehicle infixed position parallel to and above the ridge, moving a grindingassembly carried on the beam along the beam for grinding the ridge. 7.The method according to claim 6 wherein the beam carries ground engagingelements for locating a height of the beam above the ground so as toprovide a gauge for a depth of grinding.
 8. The method according toclaim 6 wherein the grinding assembly includes a rotary member with anouter surface for engaging the ridge, the rotary member being rotatableabout an axis transverse to the beam.
 9. The method according to claim 6wherein the rotary member has a series of grinding teeth.
 10. The methodaccording to claim 6 wherein the grinding member has a width transverseto the beam which is approximately equal to the width of the ridge.